Tandem disk harrow



Oct. 16, 192s. 1,688,025

H. s. DICKINSON TANDEM DI SK HARROW INVENTOR Harry S. Dicl'yon fi/ ATTO R NEY Oct. v.16, 1928.y 1,688,025

H. S. DICKINSON TANDEM DISK HARROW Filed Nov. 12. 1920 4 sheets-sheet 2 FIG. 2

INVENTOR Harry S. Dickinson TTORNEY v Oct. 16, 1928.

H. s. DlcklNsoN TANDEM DISK HARROW 4 Sheets-Sheet 3 Filed Nov. 12 1920 INVENTOR Harry S. Dlkmson Q7 @JM ATTORNEY 0ct. 16, 1928. l 1,688,025

H. s. DlcKlNsoN TANDEM DISK HARROW Filed Nov. 12 1920 4 Sheets-Sheet 4 d H u..

FL Q S? 9 l t 3 Lo 2 .lll lu= 1V? l@ m v E u.,

U' ,-1 La INVENTOR Harry S. Dickinson Z7 AT ORNEY.

' working position.-

Patented Qctd. r16, 1928.

' UNITED STAT-E9s f'PATENT VoI-1-"1cs..f

HARRY S. DICKINSON,OF MOLINE, ILLINOIS, ASSIGNOR, BY USINE LSSIGNHEN'I'S,v I0

EIVIIIRSON-BRANTINGI-IAM CORPORATION, `F

TION OF ILLINOIS.

ROCKFOPBD, ILLINOIS, A mnh- TANDEM DISK HARBOW..

.Application med November 12, 1920. semi no. 423,705.

The invention relates totandem disk harrows.

It is concerned principally with mechanism for angling` the disk gangs into and out of working` position.

It is desirable in tandem diskY harrows toA have a convenient means for angling the gangs in the working position and'to return them to transport position,'that is, a position in which the disks are' parallel` with the line of draft. Various constructions have been devised for utilizing the draft on the harrow for angling the gangs, such construction, however, usually requiring that lthe hitch Vto the harrow be changed, or that the tractor be stoppedV and backed up for .changing the angle of the gangs. The `present invention has been devised for the purpose of avoiding the necessity for changing the hitch, or of stopping the tractor for the purpose of changing the gang angles and at the same time to provide desired adjustments in the angling movementso that the harrovv may be set to'pertorm its work in a manner.

to suit the occasion. 1

The general object of the invention is to provide an improved power operated means for angling the gangs of a tandem disk harrow. 1

Another object is to provide improved adjustments in angling mechanism Vfortandem disk harrows. V v

A further Objectis to utilize the rotative power of the disks for the purpose of angling the gangs. 1 j

Other objects and advantages will appear from the specification and drawings. An embodiment of the invention is illustrated in the Vaccompanying drawing in which Figure 1 is a plan vieu7 of the harrovv showing the gangs in transport position.

Figure 2 is a side view of the harroW with the gangs in transport position.

isa. side view with the' ygangs in particular requirements of the y l1 1 gure 3 Figuresrt, 5 and 6 are detailed views.V of a clutch mechanism employed inco'nnection with the angling device.

The.harrovtY includes a front pair of gangs 1 and 2 and a rear The front pairl is connected by'a fra-me 5 to a draft tongue 6 andthe rear pair is pair .of gangsj and .4.

connected by frame 7 throughcross links Sto an .extensi0n`9 of the 'draft tongue. This gives a suitable, flexible ,connectionbetween the pairs .ofgangs and the cross links serve `to .guide the rear pair as related to the front pair 1n turning.

j The mechanism'for angling-the gangs inl, Vc'ludes a lever 10 pivoted at 11 tothe .draft tongue. f Connected to its llower end are links 12 WhchLinturn are connected to the,

inner ends of the front ,pair of gangs. The upper end of'lever 10 is connected by a link 13 to a second lever 14 kpivoted .to the tongue extension 9. Lever 1.4 is connected by 'ya chain to Jlinks .16 connected to the .inner ends ,ofl the Vrear pair of gangs. It will be clear that when the upper end of lever 10 ismoved forward from the position Shown 1n Figure 2 thatthe links l2 will be. moved backward, thus moving the inner ends of the front set of gangs rearwardly and the `link 13 will be moved forward, thus pulling the inner ends of the rear pairof "forywardly. The reverse action. will take place when the lever 10 lis .moved in the opposite -V .dlrection except that, as to the rear pair of gangs, the .chain 15`is slackedpa/nd the gangs automatically drift to theirv transport',A position -or to the position's'hown in Figure 3.

connection could be substituted for-the chain l5, thus making the laction positive in all cases. y

Provisionl is made for varying'the angle yIt will be understood, however, thata rigid to which the ,rearl pair of vgangs may be moved as related to the .angle to which the yiront pair of gangs may be moved and vat the same time providing ay mechanism Vwhich will return the gangs to their initial or transport position: when V,the mechanism is moved for 4that purpose. Ths'result is accomplished by vhaving `the lever 14 in the form of 'an arc, the curvature of which is ydeterl'nined bya radius struck from the center 14', that is, thepoint l where the chain 15 is attached -to the rear frame. It will be observed by referring to Figure 2 where .the disks .arefin transport .-position, that' the Position of the Part-S iwll .be the Same 'ref gardlessof Whichof the .holes in member 1 4 are used forjconnectingthewhain 15 to it. It will be noted, however, that-,ifnthe chain v1.5 is connected inthe holeand the .of one of the'l gang shafts and 'it drives 'fthe same initial position.

,jack-shaft 28 journaled lever 10 moved forward through 'the arc that it normallyis moved through, the chain 15 will be moved through a distance which is relatively -small as compared with thedisx tance/that it would be movedv iorward if it were connected in one of the upper holes. In other words, the distance which the chain 15 is moved can be varied, but in every case it will be returned to its initial position.

Provision is also made for varying the angle to which both pairs of gangs are moved vin their movement to workingposition and at the same time, a mechanism' that will return both pairszo'f gangs to transport position regardless of the angle to which they have been moved. This result is secured Vby making the arm 10 in the-form of an' are described bya radius determined. by the arm y2() which is pivoted at the point 21. Here again, it will 'be observed that the position Vthe arm 2O is connected in one of the lower holes, for example,` or in one of the upper 'hole'sz' In this manner, the angle to which the Vgangs are moved can be variedbut, in every case, both gangs will be returned to The power for operating'the gang angling mechanism is derived from the rotation of the disks. A sprocket 25.is liXed on the end through a chain 26, a sprocket 27 fixed to a i in a lbearing 29 carried by the disk gang. Jack-shaft 28 lis con- `nected through av universal joint, a slip con- '.nection 30, and a universal joint 31 to a clutch 32. This clutch drives the crank or pivot 21 and moves the arm 2O to operate the angling mechanism. I .A

The clutch is shown in detail in Figures 4, 5' and 6. It1 includes a shaft 4G continuouslyfdriven by the universal joint 3l and carried bybearings 41 and`42'lixed to the traine of the barrow. Keyed to the shaft aninternal vclutch member 43 having in- -ternal notches 44, lillustrated in Figure. Journaled loosely 'on the shat't 40 a inember 45 which is'keyed to the crank arm 46. It will be clear that the member 43 'rotates continuously with'the shaft 40, whereas the, member 45 'normally remains stationary.

'When it isdesired to drive themember 45 and with it crank 46, it, therefore, becomes necessary 'to momentarily interconnect the parts 43 and 45. For this purpose theinember 45 has, an exterior extension 47 to which ispivoted an arm 48 carrying a roller 49. The roller is arranged 'tov engage the notches on the interior member 43 and it is normally biased by a spring 50 to engage such notches.

Both ends of the arm 48 extend beyond the rim of member 45. The member 45 has two projections 51 and 52 having notches 53 for the reception ot a roller 54 carried by a trip arm 55 which is normally biased by a-spring 56 so that roller 54 engages in onel of the notches 53. The spring 56 is stronger than the spring 50, and, consequently, when the clutch is in its normal position as shown in Figure 7 with the roller 54 in notch 53, the upper 'end ot arm 48 will be biased in a counter-clockwise direction sucient to keep the roller 49 out of engagement with the notches 44 on the interior of the clutch member 43.l Accordingly, the clutch is normally held disengaged and the member 43 will rotate withoutv imparting any motion to member 45. It, however, the vtrip `lever 55 is operated by means ot a cord or chain 57, a lever or otherwise engaged because, as soonas roller 54 leaves notch 53, the spring 50 will move lever 48 to cause roller 49 to engage one 'of the notches 44 on the interiory ot Vmember 43.

This causes clutch member" 45 to be rotated so'as to pull theA4 'roller 54 out Ot' notch 53, the clutch will be vanV operation unt-il it has moved a halt revo- Y lution in a clockwise direction as viewed in Figure 6. As it nears the endl of la lhalf revolution, the projection 52 comes into contact with roller 54 and gradually raises it against the tension' ot spring 55 and then the notch 53y in projection 52 comes opposite roller 54, whereupon the tension of spring 56 pulls the -'roller into Athe notclithereby vcontacting the end ot lever or arm 43 and moving such arm to cause the roller 49 to move out of engagement with the cooperating notch 44 on member' 43, The mechamsm is thus automatically stopped after it has moved a halt revolution. It willl alsoV be observed that, in order to setthe mechanism into operatiomit is only necessary to give the trip lever 55 a momentary pull such as might be delivered by a chain. a cord or a lever and kafter such movement has been given, the mechanism will continue in operation for a haliirevolution and then be autoinaticallyv stopped.

The operationof the harrow as a lwhole is as follows: A

Vith the" hariow in the transportposition as shown in Figure 3' and assuming that it is desired to move the disk Vgangs into working position andthat the harrow is being drawn `forward with the in transport position, the operator pulls the cord 57 which trips the clutch. The power of the rotating disks will then be applied to CTX moved the inner ends of the front pair rear-A wardly and the inner ends of the rear pair of gangs forwardly.

If it is desired to return the gangs to transport position with the tractor moving forward and the gangs in working position, the operator again'pulls the cord 57 which trips the clutch and causes it to move a half revolution to move the crank 46 from the position shown in Figure 3 to that shown in Figure 2 whei'e it is automatically stopped. This movement vwill have moved the levers l() and 14 rearwardly, thereby having' moved the inner ends of the front pair forward and having slacked thechain lk to permit the inner ends of the paii to move rearwarddue to the resistance of the ground.

"The operator can change the working angle to which the discs will be moved by simply adjusting the lever 22 which will vary the effect of the throw of the crank 46 on the lever mechanism for angling the discs. The gangs will always be returned to transport position regardless of how the mechanism is set to obtain a different working angle.

The operator can also angle theA rear gangs differently from Vthe front gangs by simply connecting the chain l5 in the desired hole in lever 14. rlChis will vary the effective action of the link mechanism on the rear gangs, but in each case will return the gangs to transport position regardless of the angle at which they have been moved for working.

It is to be understood that the construc-` tion shown is for purposes of illustration and that variations may beY made therein without departing from the spirit and scopey of the invention as defined in the appended claims. t

That I claim iszn l. In a harrow, the combination ofY a plurality of sets of pivoted harrow sections arranged in alignment with each other, means for setting said harrow sections, said means cooperating to move one end of said pivoted sections. and automatic means for moving said ends relatively to each other and restoring said ends to their original position, the adjustment of the setting means being maintained during said movement.

2. In a harrow, the combination of a plurality of sets of pivoted harrow sections, oneA set being arranged in rear of the other, means for setting said harrow sections, said means cooperating to move the inner ends of said harrow sections and automatic means for moving said ends relatively to each other,

and lrestoring :said l'ends to their #original position, the adjustment of thewsetting means" being maintained yduring :said movement.

In ajharrow, ithe lcombination `of a rp'luifality vof :sets of pivoted .harrowfsections,

means .for setting one .of-,said .barrow ssets,

said means including-v .a lever mechanism,

means for moving said hari'ow set from its set position, said means including a clutch for actuating said lever mechanism.

4. A disk harrow having a draft frame, a pair of gangs, a clutch mechanism mounted on the draft frame, said mechanism having a driving and a driven member, means for rotating'said driving member from one orV more of the disks of one of the gangs, and means connecting said driven member to the gangs for moving them between working and transport positions.

5. A disk liarrow having a draft frame, a pair of gangs, and vclutch mechanism for angling 'the gangs operated by rotation of the disks ofone of the gangs, said mechanism being mounted on the draft frame'and having a crank connection with the gangs and including means for varying. the angle to which the gangs are moved and for causing the gangs to be returned to a given transport position regardless of the angle to which they have been moved. 6. A disk liarrow having adraft frame, a pair of gangs, and mechanism operated by moving them back and forth between working and transport positions,A including aV lating said movements to the gangs, the lever having an arcuate portion'substantially con'- ceiitric with the connection of said link to the crank, and the link being adjustably conneet-ed to said arcuate portion, whereby the angle to which the gangs are moved may be adjusted and the gangs will be returned to a transport position regardless of the angle to which they have been moved.

7. A disk liarrow having a draft frame rotation kof the disks of one of thegangs for A iirv a pair of gangs, clutch'mechanism mounted on the draft frame and connected with the gangs for angling ythem with respect to the lineof draft, and means having a flexible connection between the clutch mechanism and one of the gangs for .operating said mechanism by rotation of said gang disks.

8. A disk harrow having a draft frame, a pair of gangs, clutch mechanism-mounted on the draft frame and connected with the gangs for angling them with respect to the line of draft, and a iexible telesco ic con* nection between the clutch mechanism and one of the gangs for operating said mecha- Vnism by rotation of said gang disks.

9. A disk harrow having a draft frame, a pair of gangs, clutch mechanism mounted on the draft frame and connected with the gangs for angling them with respect to the line `of draft, and a driving connection hetween the clutch mechanism and one of the gangs comprising,r an endless chain. driven 'by rotation of the disks of said gang, and 10 HARRY S.l DICKINSON. 

